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0
votes
24
views
How does the size and shape of gold nanoparticles affect their optical properties?
answered
Feb 24
in
Physical Chemistry
0
votes
29
views
How do the excited state dynamics of a molecule change upon the addition of a functional group, and can these changes be predicted using ab initio calculations in computational chemistry?
answered
Feb 20
in
Computational Chemistry
0
votes
44
views
How does temperature affect the conformational behavior of a polymer chain in a Monte Carlo simulation?
answered
Feb 17
in
Computational Chemistry
0
votes
28
views
What is the effect of surface coverage on the electronic properties of a metal surface, as predicted by density functional theory calculations?
answered
Feb 17
in
Computational Chemistry
0
votes
32
views
How does the phenomenon of quantum coherence and entanglement affect the behavior of electron transport in molecular and nanoscale systems, and how can this information be utilized in the design of more efficient electronic devices?
answered
Feb 14
in
Quantum Chemistry
0
votes
43
views
How can we optimize the synthesis of nylon-6,6 from adipic acid and hexamethylenediamine to obtain a higher yield and superior quality material?
answered
Feb 14
in
Chemical synthesis
0
votes
59
views
What structural and electronic parameters are necessary for a metal ion to function as a cofactor in metalloenzymes and metalloproteins, and how do these factors affect the enzyme's catalytic activity?
answered
Feb 13
in
Coordination Chemistry
0
votes
31
views
How can the efficiency of solar cells be improved through the synthesis and characterization of new materials?
answered
Feb 7
in
Materials Chemistry
0
votes
89
views
How can a better understanding of the role of chemistry in society and the economy be integrated into the chemistry curriculum to better prepare students for the workforce and contribute to the advancement of society?
answered
Feb 4
in
Chemical education
0
votes
99
views
Determine the activation energy for the electrochemical reaction that occurs between copper and nitric acid (Cu + 4HNO3 --> Cu(NO3)2 + 2NO2 + 2H2O) given that the rate constant k is 2.31 x 10^-6 mol L^-1 s^-1 at 25°C and the rate constant increases to 3.81 x 10^-5 mol L^-1 s^-1 at 45°C.
answered
Feb 4
in
ElectroChemistry
0
votes
102
views
What is a suitable protecting group for the hydroxyl group in the synthesis of a compound that also has an amine functional group? How would you remove this protecting group under mild conditions and verify the presence of the hydroxyl group in the final product?
answered
Jan 30
in
Organic Chemistry
0
votes
157
views
How much chloride ion (Cl-) is present in a 75 mL sample of a solution with an unknown concentration of sodium chloride (NaCl) using a potentiometric titration with 0.1 M silver nitrate (AgNO3) solution and a silver-silver chloride (Ag/AgCl) reference electrode?
answered
Jan 30
in
Analytical Chemistry
0
votes
38
views
How can capillary electrophoresis be used to determine the composition of a sample containing multiple ions and molecules? What are the factors that need to be considered while selecting the running buffer and other parameters for the analysis? How does the choice of detector affect the accuracy and sensitivity of the analysis? Moreover, how can the obtained information be used to identify and quantify the various species present in the sample?
answered
Jan 29
in
Analytical Chemistry
0
votes
97
views
A chemical engineering company has a mixture of ethanol and water with a concentration of 30% ethanol to separate using a distillation column. The company needs to obtain a concentration of 80% ethanol in the distillate at a reflux ratio of 3. Calculate the number of theoretical plates required in the column for the separation, assuming no vapor or liquid bypass, and that the minimum vapor velocity is maintained.
answered
Jan 22
in
Chemical engineering
0
votes
43
views
Who developed the Iowa Gambling Task?
answered
Jan 20
in
Psychology
0
votes
59
views
Where does the debate between free will and determinism take place?
answered
Jan 20
in
Psychology
0
votes
40
views
Where did the concept of the unconscious mind originate?
answered
Jan 20
in
Psychology
0
votes
49
views
According to humanistic theory, why do individuals struggle with low self-esteem?
answered
Jan 17
in
Psychology
0
votes
34
views
Why is it important to consider the ecological validity of a study?
answered
Jan 17
in
Psychology
0
votes
55
views
What is an example of a mesosystem in ecological systems theory?
answered
Jan 17
in
Psychology
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